"most likely"? Absolutely not - most quantum effects would decohere in the brain and there is little evidence to suggest that it is not a largely classical machine.

People are only attracted to this idea because it rescues the concept of "true consciousness" but I am not even convinced that is the case either - it still is deriving from a deterministic evolution of a wave function.

To rephrase: sentience is most likely a kind of emergent phenomenon of physics.

Most likely true yet completely hand waving and inane.

What does an 'emergent quantum phenomenon' get us beyond... appealing to a branch of physics that most of us don't understand very well?